[urq] another A/C - ventilation question

[djdawson2 at aol.com]

Thanks Tony.  This is all good info.  I'm actually planning on swapping in a complete late model wiring harness/fuse panel, in which case the A/C controls will be replaced as well.
 
In the meantime, I'm messing with the old stuff just so I can use it until I take it apart.  It is kind of fun trying to make the old things work, but I'm sure the novelty will wear off.
 
Dave
 
 
-----Original Message-----
From: tlum at flash.net
To: djdawson2 at aol.com; urq at audifans.com
Sent: Mon, 24 Jul 2006 4:08 PM
Subject: Re: [urq] another A/C - ventilation question


At 02:51 PM 7/24/2006, djdawson2 at aol.com wrote: 
> 
>So... any insight on how this works/should work? There must be a check >valve... where? I assume I should check the diaphragm that moves the >flap... and any plumbing. 
> 
>Any BTDT's greatly appreciated. 
> 
>Dave 
 
Dave, 
 
The urq's primitive A/C operates in recirculate mode always (no fresh air) once the temp lever goes to max cold. Vacuum to the fresh air door is controlled by a little vacuum switch right on the controls. Sounds like a vacuum leak in that section. If the switch is cracked, you're going to have to go to do what Audi did in '84 by switching the flap servo with an electric solenoid like on the 4000 quattros. You will need the later coupe GT panel with the A/C rocker switch and do some minor re-wiring. Looks better anyway. You'll also need to put the thermostat on the evaporator as the old controls also had the thermostat switch mounted on it. 
 
Tony 
'83 urquattro #302 
 
 
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